As ever, I am fighting a marginally winning battle against my 1991 Mazda MX-5, and this is the story of how I came to install a wideband oxygen sensor in my Japanese thoroughbred. It came about as ...

Most aftermarket EFI systems rely on a wideband O2 sensor mounted in the exhaust of a vehicle, and the data from this sensor is one of the key parameters to give insight not only into how an engine is ...

AEM's World-famous Wideband O2 air/fuel ratio UEGO gauge features a digital LED display and sweeping LED 'needle' that changes colors as AFR changes from rich to lean. A 52mm (2-1/16") gauge housing ...